All Questions
Tagged with affine-transformation r
6 questions
2
votes
0
answers
232
views
How to remove banding artifact in R after reprojecting sf with st_transform
I have several global map layers I am plotting using ggplot() + geom_sf() + etc. All data is "+proj=longlat +datum=WGS84 +no_defs". My goal is to have Eurasia be a contiguous land mass. This ...
- 21
3
votes
1
answer
685
views
Converting coordinates from a local coordinate reference system
I am trying to define a local CRS in R based on the information in the screenshot image below
My R code is as follows:
I define the local CRS from the screenshot image
I apply it to my dummy ...
- 631
2
votes
2
answers
328
views
2D affine conversion's coefficients
I would like to calculate coefficients of a 2D affine conversion between two images.
Let me know of online pages that can help make programs using C or C++ or provide an application. I need a program ...
- 43
2
votes
1
answer
765
views
Performing affine transformation on shapefile with OGR, GDAL or other command line tools [closed]
Transformations with WKT or EPSG code are made easy with ogr2ogr, but are there tools for me to define my own affine transformation to apply to the coordinates of a shapefile?
Or, in general, is ...
- 41
2
votes
0
answers
371
views
Defining the boundary of a catchment area
I digitized contour lines from topographic maps and created a DEM. With the DEM, I estimated the boundary of a catchment area. Estimated positional accuracy of topographic maps is RMSE = 65 m, with a ...
- 131
5
votes
2
answers
2k
views
Seeking QGIS affine equation?
I am at the mercy of a govt authority who have provided utility information in a cad format with a 0,0 origin and a nonsense grid. About a dozen files, the grid and origin are entirely arbitrary.
To ...
- 3,520